<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 警告提示 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- from表单 -->
      <el-form
        :model="addFrom"
        :rules="addFromrules"
        ref="addFromRef"
        label-width="100px"
        label-position="top"
      >
        <!-- tabs 区域 -->
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addFrom.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addFrom.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addFrom.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addFrom.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                v-model="addFrom.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_id">
                <el-checkbox
                  :label="item2"
                  v-for="(item2,index2) in item.attr_vals"
                  :key="index2"
                  border
                  :checked="true"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要提交的后台api -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addFrom.goods_introduce"></quill-editor>
            <el-button type="primary" @click="add" class="btnAdd">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="PreviewDialogVisible" width="50%" >
      <img :src="PreviewPaht" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      //步骤条的active绑定
      activeIndex: "0",
      //添加商品的表单数据对象
      addFrom: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //级联双向绑定数据
        goods_cat: [],
        // 图片数组
        pics: [],
        //商品详情描述
        goods_introduce: '',
        attrs: []
      },
      //添加商品的表单校验对象
      addFromrules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请输入商品分类", trigger: "blur" }
        ]
      },
      //商品列表保存
      cateList: [],
      //
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children"
      },
      //保存获取动态列表参数
      manyTableData: [],
      //保存获取静态列表参数
      onlyTableData: [],
      //上传图片的api
      uploadURL: "https://www.liulongbin.top:8888/api/private/v1/upload",
      //图片上传headerObj请求头对象
      headerObj: {
        Authorization : window.sessionStorage.getItem("token")
      },
      //
      PreviewPaht: "",
      //图片预览对话框是否显示
      PreviewDialogVisible: false
      
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取所有商品列表参数
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品列表失败!");
      }
      this.cateList = res.data;
    },
    //
    handleChange() {
      if (this.addFrom.goods_cat.length !== 3) {
        this.addFrom.goods_cat = [];
      }
    },
    //
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addFrom.goods_cat.length !== 3) {
        this.$message.error("请输入正确的内容！");
        return false;
      }
    },
    //获取动态参数列表
    async tabClicked() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态列表参数失败！");
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" }
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态列表参数失败！");
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? "" : item.attr_vals.split(" ");
        });
        this.onlyTableData = res.data;
        console.log(res);
      }
    },
    //处理添加图片预览效果
    handlePreview(file) {
      console.log(file)
      this.PreviewPaht = file.response.data.url
      this.PreviewDialogVisible = true
    },
    //处理图片删除的操作
    handleRemove(file) {
      //1获取将要删除图片的零时路径
      const filePath = file.response.data.tmp_path;
      //2.从pics数组中找到这个图片对应的索引值
      const i = this.addFrom.pics.findIndex(x => x.pic === filePath);
      //3.调用splice方法从pics数组中删除
      this.addFrom.pics.splice(i, 1);
    },
    //监听图片上传成功事件
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path };

      this.addFrom.pics.push(picInfo);
    },
    //
    async add() {
      this.$refs.addFromRef.validate(async valid => {
            if(!valid) {
              return this.$message.error('请填写必要的表单项！')
            }
            //深拷贝
            const form = _.cloneDeep(this.addFrom)
            form.goods_cat = form.goods_cat.join(',')
            //处理动态参数
            this.manyTableData.forEach(item => {
              const newInfo = {
                attr_id: item.attr_id,
                attr_value: item.attr_vals.join(' ')
              }
              this.addFrom.attrs.push(newInfo)
            })
            //处理静态属性
            this.onlyTableData.forEach(item => {
              const newInfo = {
                attr_id: item.attr_id,
                attr_value: item.attr_vals
              }
              this.addFrom.attrs.push(newInfo)
            })
            form.attrs = this.addFrom.attrs
            //发起请求 添加商品  商品的名称必须是唯一的
            const {data: res} = await this.$http.post('goods',form)
            if(res.meta.status !== 201 ) {
                return this.$message.error('添加失败！')
            }
            this.$message.success('添加成功！')
            this.$router.push('/goods')
        })
    }
  },
  computed: {
    cateId() {
      if (this.addFrom.goods_cat.length === 3) {
        return this.addFrom.goods_cat[2];
      }
    }
  }
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>